Stair construction.



A. E. WELLS. STAIR CONSTRUCTION. APPLICATION FILED NOV. 23. I914.

Patented July 4, 1916.

77IIIIIIIIIIIIIIIIIIIIIIIII .Anmtm E. wE 'ns, or'ronon'ro, ONTARIO, CANADA.

STAIB. cons'rauc'rron.

Specification of Letters Yatent.

Patente July 4,1916.

Application filed November 23, 1 314 Serial No. 873,451.

To all' vhomiit may 0.0mm A Be it known that I, ARTHUR.E. WELLS,

- asubject of the King of Great' Britain, and

resident of "the city of Toronto, county of York, Province-of Ontario, in the Dominion of Canada, have invented certain-new and useful Improyements in Stair Constructions described in the following specification and illustrated in the accompanying drawings, that form part of the same.

The principal objects of the in'vention are to'devise a novel form ofstructure forasteel clad stair construction which will be'very strong, may be manufactured at compara- Lively low cost, is-e asily and quickly assembled and may be packed for transportation in. a-very' limited'space, thus effecting a great saving. I

. The principal feature of thisinvention consists essentially injthe arrangement of a plurality ofunitsto extend between the side strings forming a pluralityci troughs adapted to receive a filling of suitable plastic material.

In the drawings; Figure 1 is-a sectional elevational view through a portion of 'a stair constructed in accordance with this invention showing one of the treads filled with the plastic material, Fig.2 is a sectional elevational view .of a'slightmodification in the form of the units. Fig. 3 is a front-sectional elevational view on the line db of ig. l. I

ending parts in each 'figure.-

' Referring to the drawings, 1 are the side strings of tl'iestair case which maybe of any suitable design and .are provided with inwardly extending horizontal flanges 2 here shown at t'n'e liottom edge such flanges being r 'ied integral with the side strings or separate therefrom as'may be desired.

- m of the invention-illustrated in Fig. 1f? are the step sections, here-shown formed of a Hser port on 4 having a sultable nosing at' the top and shaped at the means of suitable bolts or rivets 8.

lower end with an obtuse angularly inclincd portion 3. and a bottom or soffit port-ion 7 ar:

ranged preferably at right angles to theportion (3 and in acute angular relationship to the riser 4.

The soliit portion 7 is adapted to overlap and rest upon the inl'nrncd edge flnn'ges 2 of the side strings 1 and is secured thereto by The upper edge of: the soliit porlion '7 is bcn upilce numerals of reference indicate cor-- wardly at right angles thereto forming a flanged-adapted to fit snugly against, the angularly set portion 6 of the adjacent step section andthe said flange is secured to the adjacent sectionby suitablebolts or rivets 10. The step sections thus-formed comprise trough shaped members closed at the ends by the strings which they abut and form a plurality of receptacles mto which the cement or other plastic material to form the body of the step is-pla'ccd; The risers 4 are supported adjacent to ti'rrir upper edges by suitable brackets 11 secured to theinne'r s ide i of the risers and tothe side'stri'ngs 1 and where desirable in steps of considerable width, braces 12may be provided to areinforce the riser plates mid-way of their width, said braces bein secured to the inner side ofthe riser an to the sollit plate "7 by suitable bolts'or rivets.

In the form shown in Fi 2, the sofiit plate 13 forms part with the user but isbent "downwardly therefrom at ail-obtuse angle instead of upwardly as shown in Figz 1.

When constructed in this form the plates are lapped the one overthe other successively 7 as shown and'secured togetherby the bolts 14, the side edges being secured tothe side flanges 2 of the, strings 1 in the same manner as the structure sjhown'in Fig.1.

Two forms or methods of carrying this i invention into effect are hereinsho'wn and described but it must beunderstood that other modificationsfinthe "actual construction of the individual trough shaped members may be made without departing from the spirit of the invention so long as a portion of each of the trongh-shaped members is arranged in'a common plane twform a'- continuous undcr-slirface or sollit.

In a stair construction such as described the separate treads may he formed up in the shops and. being of a trough or angle shaped section; they may be nested together and thus occupy very little space for trans portationpurposes. The parts arc. easily fiSSQlllblQtlllSltis-simply necessary after the placing of the strings to= place the troughshapcd members in place upon the flanges .5 securing thcni in position and building up the successive steps in rotation and when all 7 are assembled and secured together a very strong and lz'rable stair frame orshell is provided.

\Vhat l. claim as my invention 1 s:

1. A stair construction, comprising, side stringshzu'ing in'wardl turned longitudinal llzulgvS, and n plnmiity-of individnzil phi-t9 member:- umiurted 'npon sa id'llanges and adapt r. to be secured t ngelher to form a. continuous sollit, each of snidjplat'e members hgu'in g 41 n i'ipwnr lly turnedportion forming the stairrisers and pockets tn rerun-e. a. filling of suitable material. to form (he (reads, A

i, -L=\ st-air construction, comprising, side slrings having in\\ -'i\rdl.y extending longi- .tn li-na l flanges; and n plurality 0f trough shaped lilate niernlw sbent into angle-for inn-{inns and hai'ing sloping. ixitt-oins fornr' ring .the stair sollit, the upper edge 01'. said (rough "shaped nienihers being bent: in)- :airclly atahrjut a right-jingle to lhe snllit and adapted tn engage a correspondingly bent. po rtion 0f the riser of the adjacent member, said troiigh members being supported at the ends upon the flanges.

3. A stair construction, comprising, side strings, hayinginivardly extending l0ngi-' iudinal v flanges, trongh shaped plate members, having perpendicularly arranged risers and bottoms sloping upwardly in aeu'te'zin- .York, Ontario, Canadii,'thisyl9th (lay of Nov. i914.

ARTHUR E. XVELLS. WiL-nessesi I Y I E'. HERON, A. G. KELL 

